211230144 has 84 divisors (see below), whose sum is σ = 637352040. Its totient is φ = 66700800.

The previous prime is 211230143. The next prime is 211230157. The reversal of 211230144 is 441032112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211230143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1294 + ... + 20594.

Almost surely, 2^211230144 is an apocalyptic number.

211230144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211230144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318676020).

211230144 is an abundant number, since it is smaller than the sum of its proper divisors (426121896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211230144 is a wasteful number, since it uses less digits than its factorization.

211230144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19338 (or 19325 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 211230144 is about 14533.7587705315. The cubic root of 211230144 is about 595.5505522545.

Adding to 211230144 its reverse (441032112), we get a palindrome (652262256).

The spelling of 211230144 in words is "two hundred eleven million, two hundred thirty thousand, one hundred forty-four".